Units

Length & Distance Converter Convert millimetres, metres, kilometres, inches, feet, yards and miles all at once in your browser. Weight & Mass Converter Convert kilograms, grams, tonnes, pounds, ounces, stones and the Brazilian arroba in one table. Temperature Converter Convert Celsius, Fahrenheit and Kelvin with the exact formula shown for every conversion. Volume & Capacity Converter Convert litres, millilitres, cubic metres, gallons, cups, tablespoons and teaspoons at once. Area Converter (m², hectare, acre, alqueire) Convert m², km², hectare, are, ft², acre, square mile and the Brazilian alqueire — full equivalence table in your browser. Speed Converter (km/h, mph, m/s, knots, Mach) Convert km/h, mph, m/s, knots, ft/s and Mach with a full equivalence table — in your browser. Data Storage Converter (GB, GiB, MB, Mbps) Convert decimal and binary storage units plus bits and bytes — and finally see why a 1 TB drive shows up as 931 GB. Roman Numeral Converter Convert numbers to Roman numerals and back, with strict validation and a step-by-step breakdown. Paper Size Reference (A4, letter, DPI pixels) Search any paper size and get its dimensions in mm, cm and inches plus pixels at 72, 150, 300 and 600 DPI. Cooking Measurement Converter Convert cups, spoons, millilitres and fluid ounces in your browser — with the cup standard your recipe actually uses. Cups to Grams Converter Convert cups, tablespoons and teaspoons to grams by ingredient — or the other way around — with densities from the King Arthur and FAO databases. Oven Temperature Converter Convert oven temperatures between Celsius, Fahrenheit and British gas marks, with fan-oven adjustment and the Brazilian recipe names. Lab Test Unit Converter Convert blood test results between conventional and SI units — the factor comes from the molar mass and never goes out of date. Power Plugs & Voltage by Country Check which plug type, voltage and frequency a country uses, and whether your devices need an adapter, a voltage converter or both. Global Currency Converter Convert between any two currencies with daily exchange rates from the European Central Bank — 40+ currencies, no sign-up. Pressure Converter Convert between Pascal, bar, atm, psi, mmHg, kPa, millibar and inHg — instantly. Energy Unit Converter Convert between joules, calories, kilowatt-hours, BTU, electronvolts and other energy units. Density Converter Convert between kg/m³, g/cm³, g/mL, lb/ft³ and other density units. Torque Converter Convert between newton-metres, kilogram-force metres, pound-feet and other torque units. Flow Rate Converter Convert between litres per minute, cubic metres per hour, US gallons per minute and other flow rate units. HP / CV / kW Power Converter Convert between horsepower (HP), cavalo-vapor (CV), kilowatts (kW) and BTU/h. 35mm Equivalent Focal Length Convert any focal length to its 35mm equivalent using the crop factor of your sensor.